Dissertation/Thesis Abstract

Effect of Fly Ash and Nanosilica on Concrete Compressive Strength at Early Age
by Garcia Berrios, Nitza M., M.S., University of Puerto Rico, Mayaguez (Puerto Rico), 2015, 110; 10126922
Abstract (Summary)

The decision making process in modern construction industry is challenging when recycle materials are required. One such approach is the replacement of cement by fly ash. Unfortunately, this replacement lowers concrete’s compressive strength at its early age. To counterbalance this loss, nanosilica is being utilized. The relationships among different components upon concrete fabrication require a design of experiments with mixtures to model concrete compressive strength. A single criteria optimization strategy was adopted to recommend mixture combinations that maximize the compressive strength. The results serve as a guide to control the additions of these mineral admixtures to design a material that withstands a desired level of compressive strength. The second stage of this work encompasses the use of a multiple-criteria optimization method to optimize several concrete performance measures simultaneously, namely concrete density, porosity, and compressive strength. This approach allows recommending mixtures that contain the mineral admixtures, in addition of conventional mixtures.

Indexing (document details)
Advisor: Suarez, Oscar Marcelo, Cabrera-Rios, Mauricio
Commitee: Davila, Saylisse, Torres, Wandaliz
School: University of Puerto Rico, Mayaguez (Puerto Rico)
Department: Ingenieria Industrial
School Location: United States -- Puerto Rico
Source: MAI 55/05M(E), Masters Abstracts International
Subjects: Civil engineering, Industrial engineering, Materials science
Keywords: Cement mixtures, Early age, Fly ash, Mineral admixture, Multiple criteria, Nanosilica, Optimization
Publication Number: 10126922
ISBN: 978-1-339-84960-7
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